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https://issues.apache.org/jira/browse/SSHD-589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15010829#comment-15010829
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ASF GitHub Bot commented on SSHD-589:
-------------------------------------
GitHub user alonbl opened a pull request:
https://github.com/apache/mina-sshd/pull/15
[SSHD-589] Automatic detect dh key size on top of [SSHD-589] initial
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/alonbl/mina-sshd dh-5
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/mina-sshd/pull/15.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #15
----
commit 3ed92010b67e6b9226ebc0a54c3a075ce5fad850
Author: Lyor Goldstein <[email protected]>
Date: 2015-11-18T10:25:52Z
Initial code for SSHD-589
commit c1fc24c757de60b29904176c62e9bb9fac5415c4
Author: Alon Bar-Lev <[email protected]>
Date: 2015-11-18T11:38:46Z
[SSHD-589] detect max dh key size if not specified via system property
Signed-off-by: Alon Bar-Lev <[email protected]>
----
> [regression][kex] dhgex256 is disabled in 1.x if native JCE is being used
> -------------------------------------------------------------------------
>
> Key: SSHD-589
> URL: https://issues.apache.org/jira/browse/SSHD-589
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 1.0.0, 1.1.0
> Environment: Fedora
> $ java -version
> openjdk version "1.8.0_60"
> OpenJDK Runtime Environment (build 1.8.0_60-b27)
> OpenJDK 64-Bit Server VM (build 25.60-b23, mixed mode)
> Gentoo
> $ java -version
> openjdk version "1.8.0_60"
> OpenJDK Runtime Environment (IcedTea 3.0.0pre06+ra9817b9f8a21) (Gentoo
> icedtea-3.0.0_pre06)
> OpenJDK 64-Bit Server VM (build 25.60-b23, mixed mode)
> Oracle
> NOTE1: Disable SunEC provider at jre/lib/security/java.security to reproduce.
> NOTE2: Install UnlimitedJCEPolicyJDK8
> $ java -version
> java version "1.8.0_65"
> Java(TM) SE Runtime Environment (build 1.8.0_65-b17)
> Java HotSpot(TM) 64-Bit Server VM (build 25.65-b01, mixed mode)
> $ sshd -V
> OpenSSH_6.9p1, OpenSSL 1.0.1k-fips 8 Jan 2015
> Reproduce server: dev.gentoo.org (Kex only)
> Reporter: Alon Bar-Lev
> Priority: Minor
> Attachments:
> 0001-SSHD-589-Enable-dhgex256-if-4096-DH-is-supported.patch,
> 0001-SSHD-589-Logging-improvements.patch,
> 0001-SSHD-589-Runtime-detection-of-DH-size.patch,
> 0002-Initial-code-for-SSHD-589.patch,
> 1000-SSHD-589-Enable-dhgex256-if-4096-DH-is-supported.patch, test1-0.14.log,
> test1-master.log, test1.tar.gz
>
>
> Using:
> 1. Same JVM to run test of 1.x and 0.x
> 2. The SunEC provider is not available.
> 3. BouncyCastle is not used.
> 4. The same Fedora-22 remote is accessed.
> Using sshd-core-0.14 works, using sshd-core-1.0.1(master, and any 1.x)
> produces:
> java.lang.IllegalStateException: Unable to negotiate key exchange for kex
> algorithms (client:
> diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1 / server:
> [email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1)
> at
> org.apache.sshd.common.session.AbstractSession.negotiate(AbstractSession.java:1334)
> at
> org.apache.sshd.common.session.AbstractSession.handleKexInit(AbstractSession.java:478)
> at
> org.apache.sshd.common.session.AbstractSession.doHandleMessage(AbstractSession.java:412)
> at
> org.apache.sshd.common.session.AbstractSession.handleMessage(AbstractSession.java:361)
> Per Lyor request, added some more debug information into master.
> Attached:
> 1. Full test environment (test1.tar.gz) a directory per version, test using:
> JAVA_OPTS="-Djava.util.logging.config.file=./logging.properties"
> ./ssh-test.sh --host=XXXX --password=XXXX --command="echo hello"
> 2. Full debug log of 0.14 and master.
> 3. Diff of logging.
> This is a behaviour change in 1.x, so far we have failed to nail it.
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